Qc2+ is only move I think. At least I can't find anything advantageous for white in other lines and Qc2+ keeps the draw

Not sure we really need the moves and a diagram, but I'll keep the tradition. f5 is the only move here that doesn't lose.

Let's see if he wants to continue or if he will force the draw

ffs I just forgot to play Kh2

Qd1+ is winning for him now

Hmm. This was not on my short list of potential White moves. Let me see if I can grab that a4 pawn safely...specifically, after 47...Qd1+ 48.Kh2 Qxa4. I'm not sure why White would allow this...usually I had White trying to get the e6 pawn in return, but in this line, the Black queen can defend e6 via b3, d7, or e8, and White's next move can't prevent all of those.

Perhaps a timely g4 still secures the draw, but that seems like a very complicated way of doing that.

I looked at that idea in some lines when White had already captured the pawn on e6, but in this situation, I didn't really consider the idea at all.

I'm tempted to just grab the pawn, as I don't see how my king can be in any real danger, but that sort of thinking sometimes leads to trouble. No reason not to try and figure out White's plan here first.

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Black's other options would be Kh7 (basically admitting that no progress can be made -- might as well take the perpetual with Qd1+ in that case) and Qd4+ (taking on b2). This second option is similar to some other lines I looked at -- typically, White has enough counterplay because e6 can't be defended with the queen -- say after 47...Qd4+ 48.Kf2 Qxb2 49.Qc4. And if e6 falls, White has perpetual check threats as well as just pushing the e-pawn.

Something like 47...Qxd4+ 48.Kh2 Qxb2 49.Qc4 Kh7 50.Qxe6 Qc2 51.g4

is an example of g4 lines working if White already can captured on e6 -- very hard to see how Black can prevent White from getting the draw here.

However, that's just not the case in the 47...Qd1+ lines. Black can only improve his king/queen position, so best for White is something like 47...Qd1+ 48.Kh2 Qxa4 49.g4 fxg4 50.Qc4 Qd7 51.Qe4+ Kh5 and White's king is the less safe.


If White attacks "from behind" (Q@d6, e7), then Kxf5 is a perfectly fine way to meet f5+.

Delaying g4 doesn't seem any better, and if Black controls e8, he can even play h5 and prevent g4 altogether.

Looks like a free pawn. At the very least, Black is in no danger, so this has to be the right move.